Hi all. I was watching a video https://www.youtube.com/watch?v=_fNto4JOu4E
on Youtube. Basically the guy connects a temperature sensor to an Arduino and then connects an led, fan, and servo to a breadboard that will all react when the temperature gets above a certain point. He designed this to cool down his entertainment center when it got too hot. I'm not sure if he doesn't read posts or not but I have not heard back from him on a couple of questions I had concerning the video. Could someone please take a minute to watch the video and answer my questions. I would appreciate it very much. Here is my post:
Hello. Great video!! I learned a lot from this video. Sorry for a rather lengthy post... Just a couple of stupid questions (newbie here
. What would happen if I didn't use the transistor for the fan? Would it cause a component to overheat and burn up or would the fan not work or would it just run slowly? What if you hooked up the led, fan, and servo just using the arduino 5v power? Would it burn up the board? I'm still trying to understand transistors and why they are used. Why do you hook up the 3.3v power if you're just using the 5v? Why did you plug the positive terminal of the fan to the digital pin? Was it just to show that the digital and analog pins can be used to supply 5v power? Could you have just connected the positive lead to the power rail of the breadboard? What would have been the difference? Thanks for taking the time to explain this to me. Have a great day!